package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {


	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
			System.out.println("Please specify parametrs: <amount of test data> <file> <format>");
			return;
		}
		
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if (file.exists()) {
			System.out.println("File exists, please remove it manually: " + file);
			return;
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)) {
			saveContactsToCsvFile(contacts, file);
		} else if ("xml".equals(format)) {
			saveContactsToXmlFile(contacts, file);
		} else {
			System.out.println("Unknown format " + format);
			return;
		}
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts,
			File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
				
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);	
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts,
			File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstName() + "," + contact.getLastName() + "," + contact.getAddress() + "," 
					+ contact.getHomePhone() + "," + contact.getMobilePhone() + "," + contact.getWorkPhone() + "," 
					+ contact.getEmail() + "," + contact.getEmail2() + "," + contact.getBirthDay() + "," 
					+ contact.getBirthMonth() + "," + contact.getBirthYear() + "," + contact.getGroup() + "," 
					+ contact.getAddress2()	+ "," + contact.getPhone2() + ",!" + "\n");
		}
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
			  .withFirstName(part[0])
			  .withLastName(part[1])
			  .withAddress(part[2])
			  .withHomePhone(part[3])
			  .withMobilePhone(part[4])
			  .withWorkPhone(part[5])
			  .withEmail(part[6])
			  .withEmail2(part[7])
			  .withBirthDay(part[8])
			  .withBirthMonth(part[9])
			  .withBirthYear(part[10])
			  .withGroup(part[11])
			  .withAddress2(part[12])
			  .withPhone2(part[13]);
			list.add(contact);
			line = bufferedReader.readLine();
		}		
		bufferedReader.close();
		return list;
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();
		for (int i = 0; i <amount; i++) {
			ContactData contact = new ContactData()
			  .withFirstName(generateRandomString())
			  .withLastName(generateRandomString())
			  .withAddress(generateRandomString())
			  .withHomePhone(generateRandomString())
			  .withMobilePhone(generateRandomString())
			  .withWorkPhone(generateRandomString())
			  .withEmail(generateRandomString())
			  .withEmail2(generateRandomString())
			  .withBirthDay(generateBirthDay())
			  .withBirthMonth(generateBirthMonth())
			  .withBirthYear(generateBirthYear())
			  .withGroup("[none]")
			  .withAddress2(generateRandomString())
			  .withPhone2(generateRandomString());
			list.add(contact);
		}
		return list;
	}
	
	public static String generateRandomString() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0) {
			return "";
		} else {
			return "test" + rnd.nextInt();
		}		
	}
	
	public static String generateBirthMonth() {
		 Random rnd = new Random();
		 int i = rnd.nextInt(12);
		 return String.valueOf(i);
	}
	
	public static String generateBirthDay() {
		 Random rnd = new Random();
        int i = rnd.nextInt(32);
        if (i == 0) {
                return "-";
        } else {
        return String.valueOf(i);
        }
	}
	
	public static String generateBirthYear() {
		Random rnd = new Random();
		int i = 1900 + rnd.nextInt(112);
		if (i == 1900) {
			return "-";
		} else {
		return String.valueOf(i);
		}
	}
}
